code: def get_self_bleu3_arithmetic(utterances):
      weights = (1.0 / 3, 1.0 / 3, 1.0 / 3)
      return get_self_bleu(
          utterances, averaging_mode="arithmetic", weights=weights
      )
  
file_path: fairseq/examples/textless_nlp/gslm/metrics/asr_metrics/self_auto_bleu.py
imports: import numpy
  import nltk
  from misc.bleu_utils import sentence_bleu
  import warnings
label_desc: Use image node_id 10 for calling a global function with example usage: get_self_bleu3_arithmetic(utterances) and returns: get_self_bleu